/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 *@filename: name_resolution_context_state.h
 */ 
   
   
#ifndef __COLLAPSAR_NAME_RESOLUTION_CONTEXT_STATE_H__
#define __COLLAPSAR_NAME_RESOLUTION_CONTEXT_STATE_H__

class TableList;
class Name_resolution_context;

/*
  Store and restore the current state of a name resolution context.
*/

class Name_resolution_context_state
{
private:
  TableList*  save_table_list;
  
  TableList*  save_first_name_resolution_table;
  
  TableList*  save_next_name_resolution_table;
  
  bool        save_resolve_in_select_list;
  
  TableList*  save_next_local;

public:
  /* Remove gcc warning */
  Name_resolution_context_state() {}          

  /* Save the state of a name resolution context. */
  void save_state(Name_resolution_context *context, TableList *table_list);

  /* Restore a name resolution context from saved state. */
  void restore_state(Name_resolution_context *context, TableList *table_list);

  TableList *get_first_name_resolution_table();

};


#endif /* __COLLAPSAR_NAME_RESOLUTION_CONTEXT_STATE_H__ */
